The Desktop App/environment is that icon that looks like a patch of blue sky toward the bottom right-hand side in the screenshot.

Here's the problem: We don't know whether the version on ARM that Reller showed off is new or old. Remember: At the Microsoft Build conference in September 2011, there were ARM tablets sporting the Desktop App, but they weren't available for testers to put through their paces. (Some were under glass, even.)

Texas Instruments also showed off yesterday at CES a Windows 8 ARM tablet prototype. As The Verge noted, it's still not clear even from that demo machine whether this is a newer or older Windows 8 build, so, again, it's inconclusive as to whether the Desktop App that is visible is going to be part of the final Windows 8 on ARM release.

The fact that Reller kept stressing during the Microsoft keynote last night that Windows 8 would be a "no compromise" experience -- Microsoft's preferred way of referring to its ability to support non-Metro-style apps -- makes me think there's a chance that the Desktop App will make it into the Windows 8 ARM build after all. But she never stated this outright.

Would a simple "yes" or "no" be so hard? Maybe the Softies think the answer is obvious (?). Microsoft officials, when asked whether the Desktop App will or won't be supported on Windows 8 on ARM, aren't commenting.

The Windows 8 beta is still on for "late February," Reller reiterated during the CES keynote last night. And there's still no word from Microsoft officials as to the ship target for Windows 8 (though many company watchers still think it will be summer/fall this year for both the Intel and ARM versions).